let's go back to the polygraphs that senator brown was asking about. i think i heard you say earlier that polygraphs were offered to these agents. was that not a requirement? >> i think we did about 14 or 15 polygraphs. they have the option to refuse a polygraph. >> what kind of constraints did you find in your investigation? what constraints are there and trying to get the facts of this, based on worker protections? >> going back to the polygraph, the polygraphs helped a couple people keep. their keep those particular individuals who refused to take a polygraph, we were able to come up with other information that refuted what they were saying. for us, not giving a polygraph did not really impact the way this investigation was conducted, because we were able to prove the allegations without using a polygraph. >> again, as we talked in our closed-door briefing, concern was that additional information starts coming out, other stories come out month after month. we need to get this behind us. i imagine you have the exact same concern. in your investigatio